四位机的扩展指令

2万 · 2011-3-1 15:40

四位机的扩展指令有没有更详细的关于功能方面的说明

2万 · 2011-3-1 15:42

或者说和51的差不多什么的

2万 · 2011-3-1 16:07

4bit mcu的扩展指令你可以参考IDE66的帮助文件

2万 · 2011-3-1 16:26

对，里面的描述比较详细

1万 · 2011-3-1 16:48

arithmetic instruction:
INC Mx                /*Increase Mx by 1,if Mx>0x7f, one additional RAM is used as temporary RAM*/
DEC Mx                /*Decrease Mx by 1,if Mx>0x7f, one additional RAM is used as temporary RAM*/
RL Mx, shift       /*Left shift Mx */
RR Mx, shift       /*Right shift Mx */
RLC Mx, shift       /*Left shift with carry */
INV(CPL) Mx       /* Invert Mx, if Mx>0x7f, one additional RAM is used as temporary RAM*/

1万 · 2011-3-1 17:09

compare/jump instruction:
CJNE Mx1, Mx2, addr       /*Compare, and if Mx1 is not equal to Mx2, jump to addr*/
CJE Mx1, Mx2, addr                /*Compare, and if Mx1 is equal to Mx2, jump to addr*/
CJLE Mx1, Mx2, addr                /*Compare, and if Mx1 is less than or equal to Mx2, jump to addr*/
CJGE Mx1, Mx2, addr       /*Compare, and if Mx1 is greater than or equal to Mx2, jump to addr*/
CJL Mx1, Mx2, addr       /*Compare, and if Mx1 is less than Mx2, jump to addr*/
CJG Mx1, Mx2, addr       /*Compare, and if Mx1 is greater than Mx2, jump addr*/
DJNZ Mx, addr                /*Decrease Mx by 1, and jump to addr if Mx is not equal to 0,if Mx>0x7f, one additional RAM is used as temporary RAM*/
DJZ Mx, addr                /*Decrease Mx by 1, and jump to addr if Mx is equal to 0,if Mx>0x7f, one additional RAM is used as temporary RAM*/

1万 · 2011-3-1 17:26

bit arithmetic instruction:
SETB Mx, bit                /* Set Mx:bit ,if Mx>0x7f, one additional RAM is used as temporary RAM*/
CLRB Mx, bit                /* Clear Mx:bit ,if Mx>0x7f, one additional RAM is used as temporary RAM*/
JB Mx, bit, addr                /* Test and jump, if Mx:bit is 1, then jump to addr*/
JNB Mx, bit, addr       /* Test and jump, if Mx:bit is 0, then jump to addr*/

1万 · 2011-3-1 17:26

other instruction:
LDR Mx, addr /*load the address into the RAM, Mx <- addr[15:12], Mx-1 <- addr[11:8],Mx-2 <- addr[7:4], Mx-3 <- addr[3:0], addr is 16-bit width, if Mx > 0x7F, one additional RAM is used as temporary RAM*/

2万 · 2011-3-1 17:42

多谢，呵呵